linux-kernel - [PATCH net-next 7/7] r8169: fix could not dump registers

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Message-ID: <1364824539-4156-7-git-send-email-hayeswang@realtek.com>
Date:	Mon, 1 Apr 2013 21:55:39 +0800
From:	Hayes Wang <hayeswang@...ltek.com>
To:	<romieu@...zoreil.com>
CC:	<netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	Hayes Wang <hayeswang@...ltek.com>
Subject: [PATCH net-next 7/7] r8169: fix could not dump registers

For new version of Fedora and Ubuntu, we see all 0xff when dumping
the hw regs through ethtool. Using a loop to read registers could
fix it.

Signed-off-by: Hayes Wang <hayeswang@...ltek.com>
---
 drivers/net/ethernet/realtek/r8169.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index 876e088..c9cd64c 100644
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -1889,12 +1889,16 @@ static void rtl8169_get_regs(struct net_device *dev, struct ethtool_regs *regs,
 			     void *p)
 {
 	struct rtl8169_private *tp = netdev_priv(dev);
+	void __iomem *ioaddr = tp->mmio_addr;
+	u8 *d = (u8 *)p;
+	int i;
 
 	if (regs->len > R8169_REGS_SIZE)
 		regs->len = R8169_REGS_SIZE;
 
 	rtl_lock_work(tp);
-	memcpy_fromio(p, tp->mmio_addr, regs->len);
+	for (i = 0; i < regs->len; i++)
+		*d++ = RTL_R8(i);
 	rtl_unlock_work(tp);
 }
 
-- 
1.8.1

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